diff --git a/README.md b/README.md
index 9ff7049..c900aaf 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,68 @@
 
 A library for working with character cards.
 
+## Installation
+
+To install the library, use npm:
+
+```sh
+npm install @openrouter/character
+```
+
+## Usage
+
+Here's a simple example of how to use the library:
+
+```javascript
+import { Character } from '@openrouter/character';
+
+const file = new File(['{"name": "John Doe"}'], 'character.json', { type: 'application/json' });
+
+Character.fromFile(file).then((character) => {
+  console.log(character.name); // Output: John Doe
+});
+```
+
+## API Documentation
+
+### `Character`
+
+#### Properties
+
+- `metadata`: The metadata of the character.
+- `fallbackAvatar`: The fallback avatar of the character.
+
+#### Methods
+
+- `static fromFile(file: File): Promise<Character>`: Creates a `Character` instance from a file.
+- `avatar`: Returns the avatar of the character.
+- `description`: Returns the description of the character.
+- `name`: Returns the name of the character.
+
+## Comprehensive Example
+
+Here's a comprehensive example demonstrating the `Character` class:
+
+```javascript
+import { Character } from '@openrouter/character';
+
+const jsonFile = new File(['{"name": "John Doe", "description": "A brave warrior"}'], 'character.json', { type: 'application/json' });
+const pngFile = new File([/* PNG file data */], 'character.png', { type: 'image/png' });
+const webpFile = new File([/* WEBP file data */], 'character.webp', { type: 'image/webp' });
+
+Promise.all([
+  Character.fromFile(jsonFile),
+  Character.fromFile(pngFile),
+  Character.fromFile(webpFile)
+]).then(([jsonCharacter, pngCharacter, webpCharacter]) => {
+  console.log(jsonCharacter.name); // Output: John Doe
+  console.log(jsonCharacter.description); // Output: A brave warrior
+
+  console.log(pngCharacter.avatar); // Output: Base64 encoded PNG avatar
+  console.log(webpCharacter.avatar); // Output: Base64 encoded WEBP avatar
+});
+```
+
 ## Acknowledgements
 
 - https://github.com/SillyTavern/SillyTavern
diff --git a/tests/character.test.js b/tests/character.test.js
new file mode 100644
index 0000000..fcc5b9f
--- /dev/null
+++ b/tests/character.test.js
@@ -0,0 +1,55 @@
+import { Character } from '../src/index.js';
+import { test, describe } from 'node:test';
+import assert from 'node:assert';
+
+describe('Character', () => {
+  test('Character.fromFile with JSON file', async () => {
+    const file = new File(['{"name": "John Doe"}'], 'character.json', { type: 'application/json' });
+    const character = await Character.fromFile(file);
+    assert.strictEqual(character.name, 'John Doe');
+  });
+
+  test('Character.fromFile with PNG file', async () => {
+    const pngData = new Uint8Array([
+      0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, 0x00, 0x00, 0x00, 0x0D,
+      0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
+      0x08, 0x02, 0x00, 0x00, 0x00, 0x90, 0x77, 0x53, 0xDE, 0x00, 0x00, 0x00,
+      0x0A, 0x74, 0x45, 0x58, 0x74, 0x63, 0x68, 0x61, 0x72, 0x61, 0x00, 0x7B,
+      0x22, 0x6E, 0x61, 0x6D, 0x65, 0x22, 0x3A, 0x22, 0x4A, 0x6F, 0x68, 0x6E,
+      0x20, 0x44, 0x6F, 0x65, 0x22, 0x7D, 0x00, 0x00, 0x00, 0x0A, 0x49, 0x44,
+      0x41, 0x54, 0x78, 0x9C, 0x63, 0x60, 0x00, 0x00, 0x00, 0x02, 0x00, 0x01,
+      0xE2, 0x21, 0xBC, 0x33, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4E, 0x44,
+      0xAE, 0x42, 0x60, 0x82
+    ]);
+    const file = new File([pngData], 'character.png', { type: 'image/png' });
+    const character = await Character.fromFile(file);
+    assert.strictEqual(character.name, 'John Doe');
+  });
+
+  test('Character.fromFile with WEBP file', async () => {
+    const webpData = new Uint8Array([
+      0x52, 0x49, 0x46, 0x46, 0x3A, 0x00, 0x00, 0x00, 0x57, 0x45, 0x42, 0x50,
+      0x56, 0x50, 0x38, 0x20, 0x0A, 0x00, 0x00, 0x00, 0x30, 0x2E, 0x30, 0x30,
+      0x2E, 0x30, 0x30, 0x2E, 0x30, 0x00, 0x00, 0x00, 0x2F, 0x00, 0x00, 0x00,
+      0x4C, 0x49, 0x53, 0x54, 0x3A, 0x00, 0x00, 0x00, 0x4A, 0x53, 0x4F, 0x4E,
+      0x3A, 0x7B, 0x22, 0x6E, 0x61, 0x6D, 0x65, 0x22, 0x3A, 0x22, 0x4A, 0x6F,
+      0x68, 0x6E, 0x20, 0x44, 0x6F, 0x65, 0x22, 0x7D, 0x00, 0x00, 0x00, 0x00
+    ]);
+    const file = new File([webpData], 'character.webp', { type: 'image/webp' });
+    const character = await Character.fromFile(file);
+    assert.strictEqual(character.name, 'John Doe');
+  });
+
+  test('Character properties and methods', async () => {
+    const metadata = {
+      name: 'John Doe',
+      description: 'A brave warrior',
+      avatar: 'none',
+      system_prompt: 'A warrior in a fantasy world'
+    };
+    const character = new Character(metadata);
+    assert.strictEqual(character.name, 'John Doe');
+    assert.strictEqual(character.description, 'A warrior in a fantasy world');
+    assert.strictEqual(character.avatar, '');
+  });
+});